A good black unit has a kind of weight to it even when it's not heavy. You open the door and it doesn't rattle, the hinges don't creak like they're auditioning for a horror movie, and the finish is matte enough that you're not staring at your own fingerprints every time you walk past. Switch on a lamp nearby and the surface should absorb the light a little, go soft and deep, not throw it back at you like a cheap laminate does. That's the whole test, honestly. Touch it, open it, see what it does with light, and you'll know in about ten seconds whether it's a good one or a box painted black.
In an ordinary room, black units work best as the thing that grounds everything else, which sounds dramatic but just means they're good next to pale walls, pale floors, a rug with some texture to it. They sit well against warm wood tones too, so a black sideboard under a honey colored oak shelf doesn't fight, it just reads as intentional, like you meant for the room to have contrast instead of everything being the same safe beige. Morning light is kind to black furniture in a way people don't expect, it catches the edges and the piece looks almost soft. By late afternoon in a north facing room, though, the same unit can go flat and heavy, almost swallow the space, especially if the room is already small or already dim. That's the honest limit. In a tiny rental bedroom with one window and weak overhead lighting, a big black dresser can make the whole room feel like it's holding its breath. I'd think twice there, or at least pair it with something reflective, a mirror, a brass lamp, anything that gives the light somewhere to bounce.
Where it really goes wrong is rooms that are already dark by nature, basements, windowless home offices, anywhere the light is borrowed rather than real. Black units in those spaces don't look moody, they look like a problem nobody solved. They also clash hard with anything trying too hard to be rustic and sunny at the same time, distressed white wood, gingham, that whole farmhouse leaning look, the two styles just argue with each other across the room. Save the black units for spaces with decent natural light or at least one good lamp doing real work, and let them anchor a room instead of trying to brighten one.
A unit like this rewards a room that already has some light to spare, and it's worth standing in the space at different times of day before deciding where it goes.